Commit-ID: 08b55e2a9208e4841a17c9d9c2c454986392977d
Gitweb: http://git.kernel.org/tip/08b55e2a9208e4841a17c9d9c2c454986392977d
Author: Marc Zyngier <marc.zyngier@xxxxxxx>
AuthorDate: Wed, 11 Mar 2015 15:43:43 +0000
Committer: Jason Cooper <jason@xxxxxxxxxxxxxx>
CommitDate: Sun, 15 Mar 2015 00:55:01 +0000
genirq: Add irqchip_set_wake_parent
This proves to be useful with stacked domains, when the current
domain doesn't implement wake-up, but expect the parent to do so.
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Link: https://lkml.kernel.org/r/1426088629-15377-2-git-send-email-marc.zyngier@xxxxxxx
Signed-off-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
---
include/linux/irq.h | 1 +
kernel/irq/chip.c | 16 ++++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index d09ec7a..3057c48 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -460,6 +460,7 @@ extern void irq_chip_eoi_parent(struct irq_data *data);
extern int irq_chip_set_affinity_parent(struct irq_data *data,
const struct cpumask *dest,
bool force);
+extern int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on);
#endif
/* Handling of unhandled and spurious interrupts: */
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 6f1c7a5..eb9a4ea 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -948,6 +948,22 @@ int irq_chip_retrigger_hierarchy(struct irq_data *data)
return -ENOSYS;
}
+
+/**
+ * irq_chip_set_wake_parent - Set/reset wake-up on the parent interrupt
+ * @data: Pointer to interrupt specific data
+ * @on: Whether to set or reset the wake-up capability of this irq
+ *
+ * Conditional, as the underlying parent chip might not implement it.
+ */
+int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
+{
+ data = data->parent_data;
+ if (data->chip->irq_set_wake)
+ return data->chip->irq_set_wake(data, on);
+
+ return -ENOSYS;
+}
#endif
/**
--
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